list1 = [1, 2, 'abc']
list2 = [1, 2, 'abc']
print(id(list1))
print(id(list2))
list1.append('hh')
list1.append('hh')
list1.append('hh')
list1.append('hh')
print(id(list1))
list3 = list1 + list2
print(id(list3))
# 我们看到+ ,开辟了新的内存地址

x1, x2, y1, y2 = -1.8, 1.8, -1.8, 1.8
c_real, c_img = -0.62772, -.42193
print(c_real)
print(c_img)
